半干旱草原下垫面动量和感热总体输送系数参数化关系研究

岳平; 张强; 李耀辉; 王润元; 王胜; 孙旭映

doi:10.7498/aps.62.099202

摘要

本文利用锡林郭勒草原2008年春季近地层涡旋相关系统和铁塔的风、温平均梯度观测资料, 分析了总体输送系数随梯度Richardson数的变化特征, 建立了动量总体输送系数随大气稳定度、近地层风速以及感热总体输送系数随大气稳定度和近地层气温的关系. 中性条件下, 半干旱草原植被下垫面动量总体输送系数与近地层大气动力状态之间存在明显的相互作用, 总体输送系数与近地面层风速之间满足二次曲线拟合关系; 风速较小时, 大气动力特征对地表粗糙度长度的改变不是很明显, 动量总体输送系数随气流增强而增大; 而当风速较大时, 强风速会使植被高度发生改变, 动量总体输送系数随气流增强而减小. 另外, 感热总体输送系数与近地层气温之间也存在二次曲线关系. 动量总体输送系数与近地层风速之间的关系、感热总体输送系数与近地层气温之间关系的建立为总体输送系数参数化提供了重要途径, 同时该方案避免了对动力学粗糙度长度和热力学粗糙度长度的求解.

关键词:

Abstract

The momentum and heat transfer coefficients used in the atmospheric numerical models usually are taken as constants. In fact, the bulk transfer coefficients change not only with atmospheric stabilities, but also with the air motion and thermodynamic properties of the surface boundary layer. In this paper, the bulk transfer coefficients of momentum and sensible heat are determined by using the data observed by the eddy correlation system and those of the average wind velocity and temperature gradients over the Xilin Guole semiarid grassland in May, 2008. The relations between the bulk transfer coefficients and the gradients in Richardson numbers are analyzed, and the relationship between the bulk transfer coefficients and atmospheric stabilities is also studied. Finally, the changes of momentum bulk transfer coefficients with wind speed and the relations between sensible heat transfer coefficients and temperature are determined. Comparison with the eddy correlation method for observing transfer coefficients, there is a great difference between the computational values of typical Businger-Dyer similarity functions. The revised Monin-Obukhov similarity functions could significantly improve the accuracy of the transfer coefficients. Under the near neutral stratification, there was an obvious interaction between the land surface and the flow condition over semiarid regions. The momentum bulk transfer coefficient varies with the mean wind speed at 10 m according to the quadratic curve laws. Under the low wind velocity condition, the influence of the air flow on the roughness was not significant and the momentum transfer coefficient will increase with increasing wind velocity. While at the high wind speed, the momentum transfer coefficient will decrease with increasing wind velocity, for the air flow changes the roughness height of surface boundary layer. Under the near neutral stratification, there was a quadratic curve law between the temperature and the sensible heat transfer coefficient, which provides a useful parameterization scheme for sensible heat transfer coefficient. The new schemes could parameterize the turbulent fluxes with average wind velocity and temperature gradients data, and does not need to compute the roughness.

Keywords:

作者及机构信息

1.
中国气象局兰州干旱气象研究所, 甘肃省干旱气候变化与减灾重点实验室, 中国气象局干旱气候变化与减灾重点开放实验室, 兰州 730020;

2.
张掖国家气候观象台, 张掖 734000

基金项目: 国家重点基础研究发展计划(批准号:2012CB955304,2013CB430206)、国家自然科学基金(批准号:41075008,40830957)、中国博士后基金(批准号:20110490854)和中国气象局干旱气象科研基金(批准号:KYS2011BSKY01)课题的资助.

Authors and contacts

1.
Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, Key Laboratory of Arid Climate Change and Reducing Disaster of CMA, Institute of Arid Meteorology, CMA, Lanzhou 730020, China;

2.
Zhangye National Meteorological Observatory, Zhangye 734000, China

Funds: Project supported by the State Key Development Program for Basic Research of China (Grant Nos. 2012CB955304, 2013CB430206), the National Natural Science Foundation of China (Grant Nos. 41075008, 40830957), the China Postdoctoral Science Foundation (Grant No. 20110490854), and the Postdoctoral Science Foundation of the Institute of Arid Meteorology of CMA (Grant No. KYS2011BSKY01).

参考文献

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[3]	Li H Y, Zhang Q, Wang C L, Zhao J H 2012 Acta Phys. Sin. 61 195201 (in Chinese) [李宏宇, 张强, 王春玲, 阳伏林, 赵建华 2012 61 195201]
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[35]	Kondo J, Yamazawa H 1986 Bound.-Layer Meteorol. 35 331

施引文献

[1]	Zhang Q, Wei G A, Huang R H, Cao X Y 2002 Sci. China. D 45 468
[2]	Li H Q, Guo W D,Sun G D, Zhang Y C 2011 Acta Phys. Sin. 60 019201 (in Chinese) [李红祺, 郭维栋, 孙国栋, 张耀存 2011 60 019201]
[3]	Li H Y, Zhang Q, Wang C L, Zhao J H 2012 Acta Phys. Sin. 61 195201 (in Chinese) [李宏宇, 张强, 王春玲, 阳伏林, 赵建华 2012 61 195201]
[4]	Zhang Q, Li H Y 2010 Acta Phys. Sin. 59 716 (in Chinese) [张强, 李宏宇 2010 59 716]
[5]	Powell M D, Vickery P J, Reinhold T A 2003 Nature 422 279
[6]	Ambes R A , Keyers D 1979 Mon. Wea. Rev. 107 963
[7]	Deardorff J W 1968 J. Geophys. Res. 73 2549
[8]	Garratt J R 1977 Mon. Wea. Rev. 105 915
[9]	Louis J F 1979 Bound. Layer Meteorol. 17 187
[10]	UNO I, Cai X M, Steyn D G, Emori S 1995 Bound. Layer Meterol. 76 395
[11]	Denny A, Subrahamanyam D,Kunhikrishnan P, Radhika Ramachandran, Somayaji K, Venkatesh R, Bhat G, Singh A 2008 Bound.-Layer Meteorol. 126 297
[12]	Bhat G S , Thomas M A , Raju J V S, Chandrasekhara C P 2002 Bound.-Layer Meteorol. 106 263
[13]	Piers S, Hall F, Ranson K Jon, Margolis H, Kelly B, Baldocchi D, den Hartog G, Josef C, Ryan Michael G, Barry G, Patrick C, Lettenmaier D, Wickland D E 1995 Bull. Ameri. Meteorol. Soci. 76 1549
[14]	Ridder K De 2010 Bound.-Layer Meterol. 134 257
[15]	Zhang J A, Black P G, French J R, Drennan W M 2008 Geophys. Res. Lett. 35 L14813,
[16]	Rao K G, Narasimha R 1996 Geophys. Res. Let. 23 2617
[17]	Yue P, Zhang Q, Niu S J, Wang R Y, Sun X Y, Wang S 2012, Acta Phys. Sin. 61 219201 (in Chinese) [岳平, 张强, 牛生杰, 王润元, 孙旭映, 王胜 2012 61 219201]
[18]	Yue P, Niu S J, Hu Y Q ,Zhang Q 2010 Sci. China Ear. Sci. 53 773
[19]	Miao M Q, Qian J P 1996 Acta Meteorol. Sinica 54 95 (in Chinese) [苗曼倩, 钱峻屏 1996 气象学报 54 95]
[20]	Gao Z, Bian L, Zhou X 2003 J. Geophys. Res 108 4387
[21]	Garratt J R, Pielke R A 1989 Bound.-Layer Meteor. 48 377
[22]	Zhang Q, Zeng J, Yao T 2012 Chinese Sci. Bullet. 57 647 (in Chinese) [张强, 曾剑, 姚桐 2012 科学通报 57 647]
[23]	Ma Y M, Tsukamoto O, Wu X M, Tamagawa I, Wang J M, Ishikawa H, Hu Z Y, Gao H C 2000 Chinese J. Atmos. Sci. 24 23 (in Chinese) [马耀明, 塚本修, 吴晓鸣, 玉川一郎, 王介民, 石川裕彦, 胡泽勇, 高洪春 2000 大气科学 24 23]
[24]	Dyer A J 1974 Boundary-Layer Meteorol. 7 363
[25]	Stull R B 1988 An Introduction to Boundary Layer Meteorology (1st Edn.) (Dordrecht: Kluwer Academic Publishers) p280
[26]	Wouters H, De Ridder K, van Lipzing N P M 2012 Bound.-Layer M eteor. 145 539
[27]	Demuzere M, De Ridder K, van Lipzing N P M 2008 J. Geophys. Res. 113 1
[28]	Yang K, Tamai N, Koike T 2001 J. Appl. Meteorol. 40 1647
[29]	Li Y, Gao Z, Lenschow D H, Chen F 2010 Bound.-Layer Meteorol 137 153
[30]	Zhang Q, Wang S, Zhang J, Wang R Y, Liu H Y, Li Y Y 2009 Adv. Ear. Sci. 24 1185 (in Chinese) [张强, 王胜, 张杰, 王润元, 刘宏宜, 李岩英 2009 地球科学进展 24 1185]
[31]	Chen J Y,Wang J M, Mitsuaki H 1993 Chinese J. Atmos. Sci. 17 21 (in Chinese) [陈家宜, 王介民, 光田宁 1993 大气科学 17 21]
[32]	Kondo J, Yamazawa H 1986 Bound-Layer Meteorol. 35 331
[33]	Ban J, Gao Z, Lenschow D H2010 J. Geophys. Res 115 D01106
[34]	Guilloteau E 1998 Bound.-Layer Meteor. 87 147
[35]	Kondo J, Yamazawa H 1986 Bound.-Layer Meteorol. 35 331

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